Carbureter.



1.o. couLoMBE.

CARBURETER.

AFPLI'cATmN mio rss. 26, 1914.

Patented Oct. 10, 1916.

3 SHEETS-SHEET 1.

INVENTR Jasepb Ci Coulombe,

A TTORNEY J. C. COULOMBE.

cmuneri.

:.QPCATION FILED FEB. 25, 19H.

Patented Oct. 10, 1916.

3 SHEETS-SHET 2- Josqab C'. C'oulomle,

J. C. COULOMBE.

CARBURETER.

APPLICATION FILED FEB. 26.19l4.

Patented Oct. 916.

3 SHEETS-S T 3.

Fig'. 8- /7 I 1,6

L I /j/- 1 -30 ,0.7 II @I 17 129 L 35 34 Fig'. 6- Fig'. 7-

w/r/v-Essfs` lum/ron v Jose/nh C'. cou/nml,

' ATTORNEI' UNITED STATES PATENT OFFICE.

JOSEPH C. COULOMBE. OF LOWELL, MASSACHUSETTS, ASSIGNOR TO HEINZE ELECTRIC COMPANY, OF LOWELL, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

CARBURETER.

Specifica tion of Leters Patent.

liiivnlml 001.. 1li, 1911i.

It is the object of the invention to provide a simple compact form of carbureter which may be readily adjusted for varying temperatnres and which will produce a properly attenuated mixture at varying speeds of the @ruine for any given adjustment.

A still further object is to provide for an .adjustment of the fuel valve Without in any Way disturbing the adjustment of the air. valve and a Still further object is to provide an automatically acting choke valve which in closed position will provide a shut-oli' for the inlet of air and open the inlet for the fuel and when released, will automatically assume a position of eut-otf with reference to the fuel and will be open to the air.

Referring;r to the drawings: Figure 1 is a top plan view of the device. Fig. 2 is a sectional view on the line 2--2 of Fig. 1. Fig. 3 is a cross-sectional view on the line 3--3 of Fig. l. Fig. 4 is a detail view of the combined air and oil valve and supporting parts. Fig. s a detail sectional view similar to Fig. Q illustrating a modified form of tapered valve. Fig. 6 is a, diagrammatic view illustrating the operation of the ordinary type of needle valve. Fig. 7 is a diagrammatic view illustrating a valve of the present invention. Fig. 8 is a detail view of i horizontal section.

lin the accompanying drawings. the device .-sluiwn in a convenient form although it is to be understood that its details in the arrangement and design of parts may be modified to a considerable extent without departing from the spirit nr intent of the invention.

leiierring to the drawings, the numeral 1 denotes the body of the carbureter which ias circular base-plate Z against which the upper edge of a float feed howl 3 which provides a tloat-feed chamber 4, This bowl 3 is held against a shoulder 5 of a dependent portion 5 of the carburetor trod if. not il ilhir: im thrill-temi rhaiuher l therty is :fi float i" vflnrl.. through :n pivoted lever el ron- .ls an inlet cidre l). which. as illustrated. of the tapered forro zuid norinallv rests inst. 'lo when the float rharnber l "fmiwd a i dent quantity .it fuel to ,o ine limsi,

:he valve :l eontrols the fuel inlet 1l tri-nah is onnertod with any suitable source o? supply. Centrally arranged with reference to the carburetor bolliY and Hout-feed chandler is a bushing 5 which has at its lower rnd an npwzn'dij; extending: apered opening lil which forium-ted through a` passage 1l with the lloatdeed rhainher 4. This bushing has at Sis lower ond the usual lraiveoli valve 15. Connected with the tapered opening' 13 is a passage 1G in the dependent' portion TN. which terminates in tho venturi l?. This venturi is of curved form oli'set from the center; of the body of the carbureter in sur-,h manner as not to inten fere with the concentricallv arranged valve stem and appurtenant parts. This venturi opens on opposite sides of a central partition 17a which divides the air inlet Side from the mixingr chamber 27. Thus the incoiningt air is all drawn through the venturi during low suction actions.

The exterior of the bushing 12 reduced in diameterv to forni a chamber 1H and this, at its upper end. through a suitable duct 18EL connects with the atmosphere so that there is an equalization of atmospheric pressure throughout the device wherever the oil supply is present.

Extending through the bushing 12 is a valve-stern 19, the lower end 20 ot' which rests at 0r near the bottom of the beveled` opening 13 while the upper end is connected with the air valve 21. This air valve 21 rests upon a seat formed in a dependent cage 23. The cage 23 is arranged preferably integral with an adjusting plugr 2l which has an interior bore '.25 serving: as a guide for the upper end 2G ot' the valve spindle. The lower end of the cage 23 projects through an opening in a partition wall 21 which with tlul wall 17 divides the inlet side of the carburetor from the mixing chamber 27.

Incoming air on low suction passes through the venturi 17. Vr'hen the suction is materially increased. the valve 2l. is raised from its seat 22 and air may then p: therethrough to be mixed with the ail.l which is pickingr up fuel from the venturi. Both the current of fuel-laden air passing.r through the venturi and that passing through the open valve 21 are thoroughly mixed in the chamber 27 from which they are passed on, bevond the throttler valve .Zl. rrlhe arrangement. of thepartitioml dividing the inlet side and the nuxiiuf side 27 are liest illustralfl in Fig.Q and o.

li ith tlul ahoxr frrangrnunl it is obvious that as tin plop; 3-3 is mlinsted., the dependent fahr '1233. sent 22;! and air valve fil are moved as a unit und ih" valve stein if) is raised low/eroi! r that its lower und 2li naar r ning' (nur "h the hei- .utc the o W eled valve Feat or' t e bushing To make adjustments for variations in temperature and consequent varial'irnis in the position of the valve stein 2() and tapered valve seat.y the screw plug' 24 nnrv he raised and lowered. thereby increasing or decreasing the amount oi' fuel which will pass from the tloat feed chamber -l through the passage Il` tapered chamber lil. opening 16 and venturi Vi7 to tlul inivinp; rnainlier.

lt is of course quite obvious that the hushing 12 might he adjusted axially with reference to the valvtA stein in lien of adiustinglr the screw plug 24 although it is preferred to adjust b v .the imeansabove deserihed and v i cally opposite the valve there is ariisl .positionis'held'ol'ien liv a spring 31 suitalilv yattached. to its jspindle. This elioke-valve has the lower end :2 of its stein provided with a .passage 33- whieh.' w-hen the valve is inv closed position with .refeienee to the inlet Btwregristei's with a passage 1&7 whieli Vextends into the float-feed eliauiher :helow the level of the fuel and also registers with a passage 36 which .extends diret-tlv into the venturi' 17. The purliose and funetion of the eliol e valvkl 3() to.1 ir( ivide for easvl starting.

of the valve 3 4. the aspiring I-i'l will-turn littol. noiiinal position.. shuttingijV olf t itand opening.r thevaiiiinlet A. wire Uor silitalile; Veonneetionextends front the vvalidi- 230 -toa eouvenient position `so that upon a 'pull ofthe wire or eonneetiou. the` valve will he closed as to the air inlet .opening :Hand will-lie open as tothe passages 3f ill?. so. that as the engine Vis Aeia.i\ked. t he suetioii. willidraw fuel directlyv i fitoin thefl'oatfeed elianilier inlothe venturi L7. Upon a release of tlie'wire or eonneetion .I t.will lieoliserved that the "vertical inlet to the-venturi li" `isari.'angeil at one side of the lai-s ing 'l2 'andthat' thef -venturi is 'offset with refereneein tluvbushing sothat-said bushing with the valve .-sleni'll) i. and,. "iappurtenantl payts are all fornied -t'lirou'gh the eentral part of' the luidvof the earhureter aiul do not Separate the venturi. lt will lalso he oliservfed that .there are a plurality 4ot the passages/ll one of whieh is illustrated in full.lines-androne in dotted lines in ["iff. 2. lt is preferred to have these Apassages irraiigfed' substantially 90" apart. [Thus -tlie-statie head and rate of [low from the float-'feed 'eliainlier -will .lie the saine under all'or'dinarv ei-inditionsregardless of the tip of the auloinoliile oi lioator otheu deviec on wliieh thtl deviee is'iised. l`liis arrangenieiit -providesl for proper feed either on `side tip` or on all grades. v v

ln Fig. fr* the parts'are the saine as illustrated in the ligures heretofore desi-riliedY with tle exenptioli of (he :il'rangl'i'iiient ollthe lower end ot'the valve fill.' This valve stein V5() is of t'uliular forni aiul is provided with an interior lil-'vel fil. the' larger end of whieh is at the' laottoiii of tlie valve stein. lrojeeting up into the tapered vaivesteiu is a standpipi-:'12 whieh is eoiineetedthrough passages .322 with the lloalAl-e'fil el'ianier l.

'l'lie fuel passes l'i'oin the loaI-feed eliain` lier through the passage bil. upper end nl the ranged .u 4Choke valve 5l() which in noriiial he passagesY sland-pipe 5;' into-the hollow valve stem 50, thenee through tht` opening fil to passages ltis. of eourse. immaterial whether theV taper is inthe luishiu; t with a ovlindrieal valve stein or a tapel'ed hollow valve stein is eiuploved with a (j vli'iulrieal stand-pipe.

provided the elosingi'of 'the valve oe'elirs at the narrowest' diaineteifinf/'the taper antl ;radn-.illv inere'ases as the. air valve raises and the speed ofthe engine is inerei'ised. ln

either event. as the air valve by its movement lopening` into whit-h extends a needle. valve.

This ditl'erenee is elearllv illustrated in the diagiannuatie illustration' of FigsJl'and 7. lu Fig. the ordinary tvpe of eylindrieal opening and needle valve is employed. Assunie that owin; r to elianges of tei'nperature or otliei' e:ui'ses. it is neeessarv to adjust the needle valve upward with re'felenee to the elvliiulriealvalve tuhe a dislanee (1 /1. This adjustment would provide a diffe-renee in area equal to the dilferenee lofthe diameter of the steni vat the point a aiid tlie'diaineter olf the stein at the point l/ as eoin'par'ed with the evlindriealopening.r into wvhielv it prjeels. 'l`he needle valve tapersto asharp point and. ofi-ourse asthe"fengineffruns at high spiaf-d. the lower end ofthe needlepvalve is brought up to a point adjaeei'it .to thev up-I per eiul of the ivliiidijieal`openin. fr It fol'- Iows tlierel'orethat having` adjusted the dista'a'ee'rl---r'for low speeds,.the hortion 1:.-L1l

Comparing.; the ditferenee in. areaof openingdue to the diiierenei-r in the taper of the valve at'the point e and the t'apei-of the \valve at lthe point Il. il apparent vthat theditferene in area between the Apoints e and is niueh less than the litlerenee in area forl the points l and l1. lt followstherefore t'hatat high speeds there will lie too small a llow of"fuel71 although tlie-adjustinent might have heenperfeetlv niade for the proper llow at-low speeds whieh latter adjustment is represented h'v Il. l. A

'(`oniparin;A the ahove eo'ndition with {"ig. i. it is appareil! that eondilions.

Assuming that a eold weather adjustment'. is iliade h v raising: the .valve stein froin the point li to the'point u, this will give a variation in valve opt-niner equal to the dill'erenee. ol' the area at the point /1' and the point. a. As theA- valve spindle is iaised under high speed to the point so that e'. eorrespo'nd with u'. Il'. the openingr of the valve. will eor' respond to the dill'erenee in area at the point; .'ll `iiiil lllt litiilil vIl". ()li \'i(l||l$l lllt dille!"- enre in area lielaeen f'. rl' is greater than there is ai reversal of -other words, an adjustment of the valve stem of Fig. 7 which will secure proper flow for low speed will maintain a proper mixture of richness at high speeds, whereas with the needle valve of Fig. 6, a proper adjustment to secure the desired richness of mixture at low speed will upon high speeds give a mixture lacking in proper richness.

Obviously, various details may be made to suit the exigencies of any particular type of construction required and the same valve arrangement may be applied in various manners.

What I claim as my invention and desireV to secure by Letters Patent is:

1. In a carbureter having an air inlet, a mixing chamber and an outlet therefrom, a partition dividing the inlet from the mixing chamber, a venturi passage openin on both sides of said partition and extending below the partition, a fuel duct for said venturi and a float feed chamber supplying fuel to said duct and' venturi.

2. In a carbureter having an air inlet, a mixing chamber and an outlet therefrom, a partition dividing the inlet from the mixing chamber, a venturi passage having an opening on both sides of the partition and a depressed passage passing below the par tition and forming a receptacle for fuel, an air valve intermediate the inlet and mixing chamber and centrally disposed with refer-' ence thereto and arranged at one side of the venturi passage, a fuel valve controlled by said air valve, a float feed chamber supplying fuel to said fuel valve and a duct connecting the fuel valve and venturi.

In a carbureter having an air inlegwa, mixing chamber and an outlet therefrom, partitioning wall arranged between the 1nlet and mixing chamber, a perforation formed through a portion of the partitioning 'wall in substantially the axial line of the inlet andoutlet, an air valve normally closing said opening, a venturi passage curving about the partitioning wall and'arranged at one side of the central line of the valve, said venturi having openings on opposite sides of the partition to the inlet and mixing chamber respectively, a fuel valve connected with and controlled by the air valve, a float feed chamber communicating with said fuel valve and a duct intermediate the venturi and fuel valve,

4. In a carbureter having an inlet, a mixing chamber and an outlet therefrom, a partitioning wall dividing the inlet from the mixing chamber, a. valve seat formed in a portion of the partitioning Wall and an air valve seated therein` a stem for said valve terminating in a fuel valve, a bushing surrounding said valve stem and valve, a. fuel fuel chamber and a-duct connecting said venturi with the fuel chamber.

5. In a carbureter having an inlet, a mix-- ing chamber andan outlet therefrom, a pai'- titioning wall dividing the inlet from the mixing chamber, a venturi passage passing about the partition and opening on opposite sides thereof to the inlet and mixing chambers respectively and at one side of a com-- mon centraly line of the inlet and outlet, an air valve arranged in the partitioning wall and centrally of the common axial line of p the inlet and outlet, a hollow valve stem connected therewith and having a tapered opening at its end, a cylindrical fuel valve rojecting into' said tapered opening, a ,oat feed chamber communicating with' said fuel valve and a duct communicating with the hollow valve stem and the venturi.

6.4 In a carbureter havin an inlet, a mixing ,chamber and an out et therefrom, a

partitioning wall dividingythe inlet from the mixin chamber, a venturi passage extending a out the partition at one side of itsy center and opening on opposite sides thereof to the inlet and mixing chamber respectively, an air valve closing an opening in the partitioning wall, a fuel valve and nozzle controlled by the air valve, said fuel valve and air valve centrally located with reference to the carbureter and with the venturi at one side thereof, a fioat feed chamber centrally arranged with reference to the fuel valve, a duct connecting said float feed chamber with the fuel valve, a fuel chamber surrounding the fuel valve and open to the atmosphere, a venturi duct connecting said chamber and the venturi and a duct connecting the fuel chamber and fuel valve.

In a carbureter, a body-part having an inlet, a mixing chamber and an outlet, a partitioning wall between the inlet and mixing chamber, a venturi passage curving below said partitioning wall at one side of the center thereof, and opening into the inlet passage and the mixing chamber, a central dependent member extending below the main body of the carburetor and centrally disposed with reference thereto, a fuel nozzle centrally arranged in said dependent member, a float feed chamber concentrically arranged about said dependent member and communicating with the fuel nozzle, an air port through the partitioning wall, :in air valve seated therein and having a stem controlling the fuel nozzle, said valve and s'tem having an axis coinciding with the central axis of thc dependent portion und a duct connecting the venturi with the fuel nozzle.

8. In a Aearbureter having an air inlet, a controlled simultaneously' vwithal Inove'ix" mixing chamber and4 an outlet therefrom, of the air valve andifuel ductsconneet ,1g a partitioning wall dividing the inlet from s aid fuel passage, venturand-a fuelfsl'lpli".A 10 the mixing chamber, a venturi passage ex- JOSEPH C. COULO'MBE'. tendingnbout thepartitio'n and opening into lVitnesses: the inlet and mixing chamber res ectively, FRANCIS COLETY,

, u valve for closngt-he inlet, a fue 'passage KATE BRENNER. 

